Fix a crash in the find and the find&replace dialog when the searchstring was empty.
CVS: ---------------------------------------------------------------------- CVS: Enter Log. Lines beginning with `CVS:' are removed automatically CVS: CVS: Committing in . CVS: CVS: Modified Files: CVS: Tag: ABI-1-0-0-STABLE CVS: ap_UnixDialog_Replace.cpp ap_UnixDialog_Replace.h CVS: ----------------------------------------------------------------------
